
Varnish
A transparent finishing layer available in gloss, satin, or matte effects. It enhances the printed surface and adds an extra layer of visual appeal and light protection.
A black poly mailer printed with an opaque, contrast-appropriate ink so the logo actually reads against the dark film. Orders start from 100 units.
Black hides what’s inside the bag, a genuine reason to choose it on its own. Once a logo goes on top of that black film, though, a separate question opens up: what kind of print actually shows up against it.
A dark or mid-tone ink that reads perfectly on a clear or white mailer can disappear almost entirely against black film, since there’s no light background left underneath it to create contrast. Getting a logo to actually show requires an opaque ink, usually white or another light colour, laid down specifically to read against the dark film rather than blending into it. Pantone references and CMYK values can be used to manage colour consistency, subject to normal variation caused by the chosen board, ink, coating and production method. That’s a genuinely different print decision from printing the same logo onto a lighter-coloured bag, where the film itself already does most of the contrast work.
A digital 3D mock-up is free. On a black mailer specifically, that mock-up earns its keep more than on a lighter bag. It’s the point where a colour that looked fine on screen either clearly holds up against black or turns out to need adjusting, ahead of confirming the actual production run. Design support is free. Pulling that in early is worth doing if the artwork itself needs adapting for a dark background rather than just resized.
Self-sealing closure and film thickness follow the same logic as any poly mailer in this range, matched to what’s shipping and how far it travels rather than fixed to one figure. Orders start from 100 units. There are no setup fees. Standard production takes 6 to 8 business days after approval. UK delivery is free.
Poly Mailer Bags covers the base format and the general reason an opaque film hides its own contents, without the logo-specific print question this page develops. Personalised Poly Mailers is where a design that needs to vary from one bag to the next belongs, rather than one artwork repeated across the whole run. Shipping garments brings its own weight-to-gauge question, and Clothing Poly Mailers answers that one.
| Box Style | All Custom Packaging |
| Dimension | All Custom Sizes & Shapes |
| Quantities | 100-unit minimum order |
| Paper Stock | Kraft, corrugated, rigid board, cardstock |
| Printing | CMYK, Pantone, digital and offset |
| Finishing | Gloss, matte, spot UV, embossing, foiling |
| Shipping | Free delivery options |
Choose from premium coating, board, printing and finishing options for your insert boxes.

A transparent finishing layer available in gloss, satin, or matte effects. It enhances the printed surface and adds an extra layer of visual appeal and light protection.

A UV-cured coating applied to specific areas of the design to create gloss or matte contrast and draw attention to important details.

A smooth, velvety coating that creates a soft tactile feel and gives packaging a refined luxury look. It improves the unboxing experience and supports a high-end product presentation.

A soft, smooth lamination with a refined satin-like finish. It gives packaging a premium feel while keeping the surface elegant, subtle, and easy to handle.

A high-gloss UV coating applied only to selected design areas to create sharp contrast, highlight logos, and add a premium visual effect without coating the whole surface.

A clear, fast-drying water-based coating that adds a smooth protective layer while maintaining a clean and professional surface finish. It is a practical choice for everyday printed packaging.

A durable protective film that helps reduce visible scratches, scuffs, fingerprints, and daily handling marks. It keeps packaging looking clean, polished, and premium for longer.

A bleached kraft paperboard made from a mix of virgin and recycled pulp, offering a clean white surface for crisp and polished packaging designs.

A natural kraft paperboard without coating, made from virgin and recycled pulp. It provides a raw, organic appearance with sturdy packaging strength.

A premium bleached paperboard coated on both sides, designed for excellent print quality, die-cutting, and professional packaging results.

A high-quality bleached paperboard coated on one side. It provides a clean printable face with a premium packaging feel.

A smooth printable paper stock that supports high-resolution graphics, clean text, and rich color output for refined packaging presentation.

A natural kraft paperboard made from strong virgin and recycled pulp. It provides an organic, earthy look for sustainable and simple packaging.

A specialty paperboard with a laminated metallic surface available in gold, silver, and other premium finishes for luxury visual impact.

A specialty paperboard with a laminated holographic surface that creates a reflective, rainbow-like appearance for eye-catching product packaging.

A recycled duplex paperboard with a white printable surface. It is ideal for economical packaging that still requires clean graphics and brand presentation.

A kraft board with a smooth clay-coated white face for quality printing and a natural kraft reverse side for a strong, authentic appearance.

A kraft paperboard with a clay-coated printable top surface and a natural unbleached kraft back. It balances clean branding with a rustic natural look.

A duplex paperboard made with recycled pulp and a coated white printable surface. It delivers smooth print results for affordable carton packaging.

A black-dyed kraft board with a natural paper texture and excellent strength. It creates a bold, premium look for luxury and specialty packaging.

A packaging technique where a die-cut opening is covered with a transparent film, allowing the product inside to remain visible while staying protected.

An embossing technique where the raised design is precisely aligned with printed artwork to improve detail, texture, and overall presentation.

A finishing process in which heat and pressure transfer metallic foil to the surface, creating a premium, shiny, and luxurious effect.

A premium finishing method that combines embossing with foil stamping to create a raised design with metallic color and strong visual impact.

A decorative process that transfers foil onto selected areas of the surface using UV-curable adhesive, creating a bright metallic effect with sharp detail.

A technique that raises a design from the surface without ink or foil, giving packaging a clean, elegant, and textured appearance.

A finishing technique that presses a design into the material to create a recessed impression without using ink or foil. It adds subtle depth and a refined tactile effect.

A fast-curing printing process that uses ultraviolet light to dry ink instantly, delivering sharp detail, vibrant colors, and a premium finish.

A durable printing method that uses a mesh screen and stencil to apply ink to surfaces. It is ideal for bold colors and high-impact packaging designs.

A traditional high-quality printing process that transfers designs from plates to a rubber blanket before printing, making it ideal for large-volume production.

A modern printing method that does not require printing plates, making it cost-effective and efficient for short runs, sample production, and small-batch quantities.

Built with three corrugated layers between four linerboard sheets, providing heavy-duty strength for large or industrial packaging needs.

A standard corrugated structure with one fluted medium and two linerboards, providing dependable strength for everyday packaging.

A corrugated sheet with one flute layer between two liners, offering lightweight strength for protective packaging.

An ultra-thin flute grade designed for lightweight packaging, small retail boxes, and high-quality printed presentation.

A slim flute grade with a flatter surface, ideal for detailed printing, display packaging, and premium retail boxes.

Made with two layers of corrugated medium between linerboard sheets, offering added strength and durability for heavier products.

A versatile corrugated flute that offers balanced compression strength, cushioning, and printability for many packaging applications.

A thinner flute grade with a smooth surface, making it suitable for high-quality printing, precise die-cutting, and neat retail packaging.

A thick corrugated flute profile that provides excellent cushioning, compression strength, and stacking support for protective packaging.

A coated linerboard with an off-white surface, suitable for high-quality printing and a refined packaging appearance.

An unbleached kraft linerboard made from recycled paper pulp, offering a natural look with strong durability for eco-conscious packaging.

A coated semi-gloss linerboard with a smooth white surface, ideal for sharp printing, premium presentation, and retail-ready packaging.

A fully bleached corrugated board with a bright white surface, designed to produce clean, vibrant, and high-quality printed packaging.

A UV-cured ink that dries instantly under ultraviolet light and creates crisp, high-quality print results on a wide range of packaging materials.

A plant-based ink made with soybean oil, offering rich color output and a more sustainable printing option for carton packaging.

A standardized color-matching system used to achieve consistent, accurate brand colors across packaging, labels, and printed materials.

A full-color printing process using cyan, magenta, yellow, and black inks to create vibrant images, gradients, and detailed packaging artwork.
Real feedback from customers who trust us with their custom packaging.
Clear answers about ordering, artwork, production, materials and delivery.
Orders start from 100 units. Standard production takes 6 to 8 business days after approval. UK delivery is free.
Multi-colour is possible, but every colour in the design still needs enough opacity to read against the black underneath it, not just the lightest one. Send over the artwork and we'll flag anything that's likely to wash out before the run is confirmed.
Mostly how it looks. A heavier ink lay-down for full opacity can add a very slight texture where the print sits, but it doesn't change the film's own thickness or how the bag seals.
Not through an ordinary kerbside bin, no. A poly mailer is a soft plastic film rather than board, so it needs a dedicated collection route, most commonly a front-of-store drop-off at a larger supermarket. An unlaminated paperboard construction may be easier to process through suitable paper-recycling streams than a heavily laminated alternative, though that comparison doesn't apply to a plastic film in the same way. Final recyclability depends on the full material and finishing specification and the facilities available locally.